from rest_framework import serializers
from .models import CourseCategory
class CourseCategoryModelSerializer(serializers.ModelSerializer):
    """课程分类信息的序列化器"""

    class Meta:
        model = CourseCategory
        fields = ["id","name"]

from .models import Course,Teacher

class TeacherModelSerializer(serializers.ModelSerializer):
    """老师的序列化器"""
    class Meta:
        model = Teacher
        fields = ["id","name","title","signature","image","brief"]

class CourseModelSerializer(serializers.ModelSerializer):
    """课程信息的序列化器"""
    # 序列化器嵌套
    teacher = TeacherModelSerializer() # 嵌套单个
    # teacher_list = TeacherModelSerializer(many=True) # 嵌套多个
    class Meta:
        model = Course
        fields = ["id","name","course_img","students","lessons","pub_lessons","price","teacher","free_lesson_list","discount_name","discount_price"]

class CourseRetrieveModelSerializer(serializers.ModelSerializer):
    """课程详情页的序列化器"""
    teacher = TeacherModelSerializer()
    class Meta:
        model = Course
        fields = ["name","course_img","course_video","brief","level_name","pub_date","period","attachment_path","students","lessons","pub_lessons","price","teacher","discount_name","discount_price","has_time"]

from .models import CourseChapter
class CourseChapterModelSerializer(serializers.ModelSerializer):
    """课程章节的序列化器"""
    class Meta:
        model = CourseChapter
        fields = ["id","chapter","name","summary","lesson_data"]